tests: Move make_tm helper function to utils file

Preparation to be able to use the function from different test files later on.

test/CMakeLists.txt

@@ -57,6 +57,7 @@ add_boost_test(types
 
 set(base_test_SOURCES
   icingaapplication-fixture.cpp
+  utils.cpp
   base-array.cpp
   base-base64.cpp
   base-convert.cpp

test/icinga-legacytimeperiod.cpp

@@ -2,6 +2,7 @@
 
 #include "base/utility.hpp"
 #include "icinga/legacytimeperiod.hpp"
+#include "test/utils.hpp"
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/date_time/posix_time/ptime.hpp>
 #include <boost/date_time/posix_time/posix_time_duration.hpp>
@@ -471,35 +472,6 @@ BOOST_AUTO_TEST_CASE(advanced)
 	AdvancedHelper("09:00:03-30:00:04", {{2014, 9, 24}, {9, 0, 3}}, {{2014, 9, 25}, {6, 0, 4}});
 }
 
-tm make_tm(std::string s)
-{
-	int dst = -1;
-	size_t l = strlen("YYYY-MM-DD HH:MM:SS");
-	if (s.size() > l) {
-		std::string zone = s.substr(l);
-		if (zone == " PST") {
-			dst = 0;
-		} else if (zone == " PDT") {
-			dst = 1;
-		} else {
-			// tests should only use PST/PDT (for now)
-			BOOST_CHECK_MESSAGE(false, "invalid or unknown time time: " << zone);
-		}
-	}
-
-	std::tm t = {};
-#if defined(__GNUC__) && __GNUC__ < 5
-	// GCC did not implement std::get_time() until version 5
-	strptime(s.c_str(), "%Y-%m-%d %H:%M:%S", &t);
-#else /* defined(__GNUC__) && __GNUC__ < 5 */
-	std::istringstream stream(s);
-	stream >> std::get_time(&t, "%Y-%m-%d %H:%M:%S");
-#endif /* defined(__GNUC__) && __GNUC__ < 5 */
-	t.tm_isdst = dst;
-
-	return t;
-}
-
 time_t make_time_t(const tm* t)
 {
 	tm copy = *t;

test/utils.cpp

@@ -0,0 +1,36 @@
+/* Icinga 2 | (c) 2025 Icinga GmbH | GPLv2+ */
+
+#include "utils.hpp"
+#include <cstring>
+#include <iomanip>
+#include <sstream>
+#include <boost/test/unit_test.hpp>
+
+tm make_tm(std::string s)
+{
+    int dst = -1;
+    size_t l = strlen("YYYY-MM-DD HH:MM:SS");
+    if (s.size() > l) {
+        std::string zone = s.substr(l);
+        if (zone == " PST") {
+            dst = 0;
+        } else if (zone == " PDT") {
+            dst = 1;
+        } else {
+            // tests should only use PST/PDT (for now)
+            BOOST_CHECK_MESSAGE(false, "invalid or unknown time time: " << zone);
+        }
+    }
+
+    std::tm t = {};
+#if defined(__GNUC__) && __GNUC__ < 5
+    // GCC did not implement std::get_time() until version 5
+    strptime(s.c_str(), "%Y-%m-%d %H:%M:%S", &t);
+#else /* defined(__GNUC__) && __GNUC__ < 5 */
+    std::istringstream stream(s);
+    stream >> std::get_time(&t, "%Y-%m-%d %H:%M:%S");
+#endif /* defined(__GNUC__) && __GNUC__ < 5 */
+    t.tm_isdst = dst;
+
+    return t;
+}

test/utils.hpp

@@ -0,0 +1,8 @@
+/* Icinga 2 | (c) 2025 Icinga GmbH | GPLv2+ */
+
+#pragma once
+
+#include <ctime>
+#include <string>
+
+tm make_tm(std::string s);